MT neurons combine visual motion with a smooth eye movement signal to code depth-sign from motion parallax.

MT neurons combine visual motion with a smooth eye movement signal to code depth-sign from motion parallax.
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DOI:
10.1016/j.neuron.2009.07.029
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发表时间:
2009-08-27
期刊:
影响因子:
16.2
通讯作者:
DeAngelis, Gregory C.
DeAngelis, Gregory C.
中科院分区:
医学1区
文献类型:
--
作者:
Nadler, Jacob W.;Nawrot, Mark;Angelaki, Dora E.;DeAngelis, Gregory C.

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感知深度的能力对于观察者与周围环境互动至关重要。在观察者移动期间,可以从视网膜上的图像运动的结果模式(运动视差)中提取关于深度的信息。然而,在没有与观察者运动相关的视网膜外信号的情况下,来自运动视差的深度符号(近对远)可能是模糊的。我们以前证明,MT神经元结合联合收割机视觉运动与视网膜外信号编码深度符号的运动视差在没有其他的深度线索。在这项研究中,头部平移总是伴随着补偿性的眼球运动,这使得至少有两个潜在的视网膜外输入源。我们现在表明,平滑的眼球运动信号提供了关键的视网膜外输入到MT神经元,用于从运动视差计算深度符号。我们的研究结果表明,一个强大的调制MT活动的眼球运动,从运动视差的深度知觉的人类研究预测。
The capacity to perceive depth is critical for an observer to interact with their surroundings. During observer movement, information about depth can be extracted from the resulting patterns of image motion on the retina (motion parallax). Without extra-retinal signals related to observer movement, however, depth sign (near vs. far) from motion parallax can be ambiguous. We previously demonstrated that MT neurons combine visual motion with extra-retinal signals to code depth sign from motion parallax in the absence of other depth cues. In that study, head translations were always accompanied by compensatory tracking eye movements, allowing for at least two potential sources of extra-retinal input. We now show that smooth eye movement signals provide the critical extra-retinal input to MT neurons for computing depth sign from motion parallax. Our findings demonstrate a powerful modulation of MT activity by eye movements, as predicted by human studies of depth perception from motion parallax.
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